Don't know for sure because I've permanently switched on, due to the fact that I can't see it if I zoom in to my main interest area of 40nm north/south and 100nm east/west direction. But I'm quite sure that it'll build up although you switch it off. Only RESET POLAR will clear it.

This video is the reason I looked into RADARBOX for purchasing!!! I was looking at blackbox recordings and stumbled on your video and was like OMG they have a radar reciever and the rest was history!s o so funny man great vid the sped up playback makes it all the better. How do you get the video recorded and sped up like that to post on youtube would like to do some of my own posted a thread somewere on radarspotters but no one replied maybe you might fill me in...thanks!

If you need more assistance please contact me via PM with detailed questions. But it is definitely a play-around and learning by doing thing. By the way I'm planing a re-do in week 31 of this year. Because there is much more traffic in the summer...